Canning why is headspace important

The bubbling food may leave a deposit on the rim of the jar or the seal of the lid and prevent the jar from sealing properly. If too much headspace is allowed, the food at the top is likely to discolor.

Also, the jar may not seal properly because there will not be enough processing time to drive all air out of the jar. Menu Audiences Clemson. Leaving the specified amount of headspace in a jar is important to assure a vacuum seal. If too little headspace is allowed, the food may expand and bubble out when air is forced out from under the lid during processing. The bubbling food may leave a deposit on the rim of the jar or the seal of the lid and prevent the jar from sealing properly.

If too much headspace is allowed, the food at the top is likely to discolor. Also, the jar may not seal properly because there will not be enough processing time to drive all the air out of the jar. FCC Disclosure To help pay for my blogging obsession, I may receive free stuff to review, or monetary compensation for writing about certain products. My promise to you is that I will always be honest about this stuff Also, some links included on this blog may be affiliate links.

Copyright Proverbs 31 Homestead. Designed by BestForBlogger. Air spaces in raw packed foods rise to the top of the jar when heat processed and may increase headspace. Siphoning may cause the loss of liquid in jars. Raw packing food and using heavy sugar syrups increase siphoning.

Loss of liquid can be reduced by allowing the jars to sit in the canner 5 minutes after processing is completed before removing the jars from the canner. Headspace in Frozen Foods Headspace is needed for frozen foods with a high moisture content. Vegetables that pack loosely have space to expand between the food pieces and don't need extra headspace.

This includes asparagus, broccoli, cauliflower, Brussels sprouts, cauliflower, peppers, and foods that are individually quick frozen tray packed. Martha Zepp. Expertise Food Preservation. Why do we need this? Entering your postal code will help us provide news or event updates for your area.